What is the source of development of platysma? Veuillez choisir une réponse. A. dorsal parts of myotomes B mesenchyme of 2nd visceral arch C mesenchyme of 1st visceral arch

The correct answer is B. The platysma develops from the mesenchyme of the 2nd visceral arch. The platysma is a thin, broad muscle located on the anterior aspect of the neck. It is derived from the mesenchyme of the 2nd visceral arch during embryonic development.